Hearing is fundamental to our perception of the surrounding world.  Achieving this effect in virtual reality requires audio that sounds real and authentic.  Implementing spatial audio to create full immersion in 360° video or interactive VR requires capturing audio or a physical acoustic modeling of the space where the scene takes place.  An appropriate soundscape can provide the quickest path to immersion for just about any VR experience, and even removing the visual element, still enables us to sufficiently perceive the surrounding world - giving us a sense of space, time, and presence.  In contrast, the silent experiences, or the ones with incongruent sound would break the sense of presence and immersion, thus immediately removing the suspension of disbelief, and as a result substantially degrading the overall experience.